Pulley.



No. 689,52I. Patented Dec. 24, I90I. J. & W. TITUS.

PULLEY.

- (Application fllad Nov. 20, 1900.)

(No Model.)

I WITNESSES INVENTORS'.

, I wk NITED STATES JonN TITUS, or OYSTER BAY, AND WILLIAM TITUSpOF OLD WESTBURY, A

NEW YORK. v

PU'LLEY.

SPECIFICATION forming part of Letters Patent N 0. 689,521, dated December 24, 1901. Application filed November 20, 1900. Serial No- 37|l91- (N model.)

To crZZ whom it may concern; invention. As-shown in the drawings, their Be it known that we, JOHN TITUs, residing rims are connected with their hubs by wire at Oyster Bay, and WILLIAM TITUS, residing spokes c c, &c., after the manner common in at Old Westbury, in the town of North Hempbicycle-wheels.

stead, in the county of Nassau and State of E E, &c., are the lags, which are intended New York, citizens of the United States, have to be of wood of any suitable kind, but which invented certain new and useful Improvemaybe of any other suitable material. These ments in Pulleys, &c.; and we do hereby delags are placed across from one wheel to the clare that the following is a full, clear, and other and rest upon the rims a a, and con- 1o exact description of the same, reference besequently parallel with the shaft or axis of ing had to the accompanying drawings, makmotion of the wheels and parallel with each ing a part of this specification, in whichother. The lags are thus arranged side by Figure 1 isa sectional view of a pulley made side around the circumference of the wheels, according to our invention in aplane parallel as shown in Fig. 2, and constitute the bar- 15 with the axis thereof. Fig. 2 is a partial secrel or working circumference of the pulley. tional view of the same in a plane transverse Each lag on each of its opposite sides, whereit to the axis thereof and in the line y yof Fig. rests upon a rim of the wheels A A, is re- 1. Fig. 3 is a detail sectional view on a larger cessed in its side, as at L, as more fully shown scale, further illustrating our said invention. in Fig. 3. Each recess has an angular or tri- 7o 20 Fig. 4 is a like View showing a modification angular shape Wider at its outer part and included in our said invention. narrower at its inner part, so that when a re- This invention relates tothat class of pulcess in one lagis brought opposite a recess in leys, &c., for belts, driving-straps, endless the next adjacent lag the two companion aprons, and the like in which the rim or wearlags together have a dovetail shape, as illus- 25 ing-surface is composed of wooden lags artratedin said Fig. 3. Placed in each of these ranged around the circumference of the pul- (so to speak) dovetailed spaces so provided by ley parallel with the axis of motion thereof. the companion recesses isablock G,in which is One object of our invention is to provide provided an internals'crew-thread. Ascrewfor the convenient adjustment of the lags to bolt I is passed through a suitable holef in 3o compensate for their shrinkage by drying or the contiguous rim CL of the adjacent wheel otherwise, so that they may at all times hold A into the internally-screw-threaded.block, firmly in position notwithstanding changes the head it of the bolt resting against the inof temperature, a further object being to proner circumference of the rim, as shown more vide a pulley of the class mentioned which fully in Fig. 3. There is thus provided to 35 shall be of exceptional strength and durability the rim of each wheel a system, extended enas compared with those heretofore in use. tirely around the rim, of devices for secur- In the practice of our invention we provide ing the adjacent end portions of the lags to two wheels A A, each of which has a rim a, the rim. which preferably is fiat on its face or outer The operation is as follows: The parts beo circumference. These wheels may have a ing in position as described,eachboltis tighthub 0 common to both, as shownin full lines ened by turning to bring each block G inin the drawings, or each may have its own ward, thereby pressing each lag laterally toseparate hub, the inner limit of which is inward the next adjacent lag around the entire dicated by the dotted lines I) b in Fig. 1. In circumference of the rims, the greater widths 5 the latter case the hubs have the same axial of the blocks at their outer ends enabling line, and a shaft A common to both wheels them to be drawn snug against the rims siis provided. The wheels A A are of the same multaneous with the lateral crowding of the radius and their distance apart may be prolags toward each other, as just described. portionate to the desired length or face of the By this means the lags are firmly secured in 50 pulley. They may be of any desired conposition to provide the face or working cirstruction consistent with the objects of our cumference of the pulley, and any shrinkage of the lags may be readily compensated by a further tightening of the blocks in the companion recesses by a proper manipula tion of the bolts. As an equivalent of the just-described bolt arrangement shown in Fig. 3 that shown in Fig. 4 may be used. In this latter the bolt I is fast to the block and has its screw-thread at its outer end within the inner circumference of the wheel-rim, wit-h the nut 6 arranged on said screw-thread and bearing against the said inner circumference of said rim.

What we claim as our invention is- 1.- In a pulley of the class described, the combination with two parallel wheels, of laterally-recessed lags parallel with each other extended from one wheel to the other and having companion recesses in their abutting sides, and devices extended through the rims of the wheels and into the companion recesses of the lags to secure the latter to the rims, substantially as herein set forth.

2. In a pulley of the class described the combination with two parallel wheels, of lags havinglateral triangularly-shaped companion recesses, screw-threaded blocks of dovetail shape arranged in coincident recesses of ad jacent lags, and bolts arranged to draw the blocks toward the rims to adjust and secure the lags upon the circumferences of the rims, substantially as herein set forth.

3. In a pulley of the class described the combination with two parallel wheels, of lags having lateral triangnlarly-shaped companion recesses, screw-threaded blocks of dovetail shape arranged in the companion recesses of adjoining lags,and screw-bolts passed through holes in the rims of the wheels into the blocks with the heads of said bolts bearing against the inner circumferences of the rims, substantially as herein set forth.

JOHN TITUS.

WILLIAM TITUS. Witnesses:

ALBERT L. CHENY, WALTER FRANKLIN. 

